Hitachi UTOPIA IVX STANDARD Series - Electrical wiring between indoor unit and outdoor unit

10.3 COMMON WIRING
! CAUTION
Alltheeldwiringandelectricalcomponentsmustcomplywithlocalcodes.
10.3.1 Electrical wiring between indoor unit and outdoor unit
• Connect the electrical wires between the indoor unit and the
outdoor unit, as shown below.
• Follow local codes and regulations when performing
electrical wiring.
• If the refrigerant piping and the control wiring are connected
to the units in the same refrigerant cycle.
• Use twist pair wire (more than 0.75 mm²) for operation wiring
between outdoor unit and indoor unit, and operation wiring
between indoor unit and indoor unit.
• Use 2-core wire for the operating line (Do not use wire with
more than 3 cores).
• Use shielded wires for intermediate wiring to protect the
units from noise obstacle at length of less than 300 m and
size complied with local code.
• Open a hole near the connection hole of power source
wiring when multiple outdoor units are connected from one
power source line.
• The recommended breaker sizes are detailed in the Wire
size section.
• In the case that a conduit tube for eld-wiring is not used, x
rubber bushes with adhesive on the panel.
• All the eld wiring and equipment must comply with local and
international codes.
• H-LINK twist pair shielded cable must be grounded in the
outdoor unit side.
! CAUTION
Payattentiontotheconnectionoftheoperatingline.Incorrectconnection
maycausethefailureofPCB.
Power source from the outdoor IVX unit to the indoor unit
(example)
Independent power source of outdoor IVX unit and indoor unit
(example)
3
3
3
L1 L2 L3 NL1 L2 L3 N
L1 L2 L3 N
Nº 0 System
Outdoor unit
Nº 0 System
Outdoor unit
Operating Line
(Shielded Pair Cable)
DC5V (Non-Pole Transmission,
H-LINK System)
Remote Control Switch
(Twisted Shielded Pair Cable)
Operating Line
(Twisted Shielded
Pair Cable)
DC5V (Non-Pole
Transmission, H-LINK
System)
Indoor Unit Indoor Unit
Terminal board
Circuit Breaker
Earthleakage Breaker
Field Wiring
Field supplied
Optional Accessory
Remote Control Switch
(Twisted Shielded Pair Cable)
Indoor Unit
Indoor Unit
Wiring example
Basic combinations (in the case of twin combination)
12
ON
DSW6
12
ON
DSW6
12
ON
DSW6
Operating line
Operating line
Operating line
Remote control line
Remote control line
Remote control line
Individual control
Running ON/OFF individually
Thermo.ON/OFF individually
Individual control
Running ON/OFF simultaneously
Thermo.ON/OFF individually
Simultaneous control
Running ON/OFF simultaneously
Thermo.ON/OFF simultaneously
ELECTRIC WIRING
PMML0395B rev.0 - 11/2015
16